"One of the main features of the Isha Upanishad, is the ethical advice it offers, and it is interesting to note that the ethics of the Upanishad are definitely based upon the metaphysical position advanced in it. The very opening words of the Upanishad tell us, that God pervades every thing. As a corollary from this metaphysical position, the ethical advice it offers is, that a man ought to enjoy whatever God bestows on him in the firm belief, that as He pervades everything, whatever is bestowed on him by God must be good. It follows naturally, that the Upanishad should forbid us from coveting another man's property. In fact, we are fittingly taught here a lesson of contentment with one's own lot in the belief that whatever happens, it is divinely ordained and it is hence good for us. Another moral advice is, that man must spend his life-time always in doing action, specifically the karmas enjoyed in the Shastras, in a mood of believing resignation to His will. Inactivity, according to this Upanishad, would be the canker of the soul. It is only when a man spends his life-time on doing actions in this manner, that he can hope to attain the ideal of Naishkarmya. Finally, the text goes on to say that a man, who sees all beings in the Self and sees the Self as existing in all beings; in fact, for whom all beings and everything that exists have becomes the Self-how can such a man suffer infatuation? What ground would such a man have for grief? Loathfulness, infatuation and grief verily proceed from our not being able to see the Brahman in all things. But a man, who realizes the oneness of all things, for whom everything has become the Self must ipso factor, cease to be affected by the common foibles of humanity". (Page 169-170 of The Creative Period by Messrs. Belvalkar and Ranade).
Bow to Shri Sai -- Peace be to all
Shri Sai Satcharitra chapter 20